tag: spinel

Transparent armor
The U.S. Naval Research Laboratory (NRL) has developed transparent armor. The technology is actually a hard transparent ceramic, based on a material called spinel. Spinel is a magnesium aluminate compound. Spinel is also a gemstone, which could come in various colors.
NRL has devised a fabrication process to create the technology, which is harder and superior to glass, sap... » read more